Translation guide
The English word "impulsive" can describe actions, decisions, or personality traits. In Japanese, the best translation depends on whether you mean acting without thinking, making a sudden decision, or having an impulsive personality. This guide breaks down the main uses and provides natural Japanese equivalents.
Describing someone who acts on sudden urges without considering consequences, or an action done in such a manner.
The most direct and common translation for 'impulsive' as an adjective describing actions or behavior. It is a na-adjective.
彼は衝動的に買い物をしてしまう。
He tends to make impulsive purchases.
衝動的な行動は後悔につながることが多い。
Impulsive actions often lead to regret.
Literally 'without thinking of before or after', this phrase emphasizes acting recklessly without considering consequences. Often used adverbially.
後先考えずに発言してしまった。
I spoke impulsively without thinking about the consequences.
Means 'rash' or 'thoughtless'. It implies a lack of careful consideration, often used for actions or remarks.
軽率な判断で失敗した。
I failed because of an impulsive decision.
Means 'on a whim' or 'spur of the moment'. It suggests acting based on a sudden idea without deep thought.
思いつきで旅行に行くことにした。
I decided to go on a trip impulsively.
Describing a person whose character is prone to acting on impulse.
The standard way to say 'impulsive personality'. It directly combines the adjective with 'personality'.
彼女は衝動的な性格で、よく計画を変える。
She has an impulsive personality and often changes plans.
Means 'short-tempered' or 'quick-tempered'. It implies impulsiveness in the sense of easily getting angry or acting hastily out of irritation.
短気な人は衝動的に怒りやすい。
Short-tempered people tend to get angry impulsively.
Means 'impatient' or 'hasty'. It describes someone who rushes into things without waiting, which can overlap with impulsiveness.
Referring to the sudden desire or impulse itself, rather than the act or person.
The noun form meaning 'impulse' or 'urge'. Often used in phrases like 'impulse buying' (衝動買い).
衝動に駆られてケーキを全部食べた。
Driven by impulse, I ate the whole cake.
衝動買いを抑えられない。
I can't resist impulse buying.
A sudden, often mischievous or criminal impulse. It implies a momentary lapse in judgment, often used in confessions.
衝動的 is the most general and neutral term for 'impulsive'. 軽率 implies carelessness and is often negative, used for rash decisions or remarks. 思いつきで emphasizes acting on a sudden idea, often without planning, and can be neutral or slightly negative depending on context.
While 衝動的な性格 is correct, simply saying 衝動的な人 can sound clinical or overly formal. In casual conversation, describing the behavior (e.g., すぐ行動する) is often more natural.
せっかちな性格で、すぐに行動してしまう。
Because of my impatient personality, I tend to act impulsively.
出来心で嘘をついてしまった。
I told a lie on a sudden impulse.